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. 2021 Nov 17;9(11):2371. doi: 10.3390/microorganisms9112371

Table 2.

Comparison of transmission rates for all households and household contacts, and for Alpha variant versus non-VOC viruses.

Households a with Transmission % with Transmission, 95% CI PCR+
(n)/(N)
p-Value b Crude OR,
95% CI
p-Value
All variants 60.0 (47.4–71.4) 39/65
Non-VOC
viruses
55.0 (39.8–70.1) 22/40 1 (Ref)
Alpha
variant
83.3 (55.9–95.2) 15/18 0.04 4.24 (0–4.2 × 1032) 0.04
Household Contact c SAR %,
95% CI
PCR+
(n)/(N)
p-Value b Crude OR,
95% CI
p-Value Adjusted OR d,
95% CI
p-Value
All variants 49.6 (37.8–61.5) 67/135
Non-VOC
viruses
42.5 (28.7–57.7) 37/87 1 (Ref) 1 (Ref)
Alpha
variant
77.8 (49.4–92.6) 28/36 0.02 65.7 (1.74–2481) 0.02 468
(1.8–1.2 × 105)
0.03

a including 65 households for all variants, and 18 households with Alpha variant, and 40 households with non-VOC viruses. b comparison of Alpha variant with non-VOC viruses. Pearson chi2 test statistics was corrected with the second-order correction of Rao and Scott and converted into an F statistic. c households with at least one confirmed case among its household contacts. d adjusted for the age and sex of the primary case and household contacts, and household size (number of persons per household). PCR+, PCR positive. p-Values < 0.05 are shown in bold.